Galaxy S6 powers on but screen remains black, won’t charge nor turn on

Hello #GalaxyS6 users! Due to an ever increasing numbers of S6 owners reporting power- and charging-related problems, we’re publishing another article that shows how to fix some forms of these issues. We hope you’ll find it helpful.

If you are looking for solutions to your own #Android issue, you can contact us by using the link provided at the bottom of this page.

When describing your issue, please be as detailed as possible so we can easily pinpoint a relevant solution. If you can, kindly include the exact error messages you are getting to give us an idea where to start. If you have already tried some troubleshooting steps before emailing us, make sure to mention them so we can skip them in our answers.

Below are specific topics we’re bringing for you today:

Problem 1: Repaired Galaxy S6 won’t turn on

I have a Galaxy S6 32GB Verizon phone that will not power on. No cracks in the front glass or LCD. No button combo will reset the phone either. When I connect it to a genuine Samsung charger, I will get a blinking red notification light after 5 seconds and it will continue to blink until the charger is disconnected. Now if I try to charge it wirelessly with a genuine Samsung wireless pad, it will light up blue to show it is charging but will start flashing blue after a 5 seconds or so. With the charger connected to the device I can get the notification light to pulsate blue as to show the phone might be in a hard reset state but nothing shows on the screen. Also with the charger connected for about 5 minutes I can hold the volume down, home button, and power button and get a faint flicker in the screen buttons along side of the home button. It is a very faint flicker in white light in the buttons but that’s about it.

I am the first to open up this device. I have it separated from the frame, main board, and front glass/LCD. Nothing looks fried or any signs of anything abnormal, only a light smell with the phone separated. The battery is not swollen or does it look damaged. No parts internally look damaged at all or any water damaged. My only guess is the battery could be bad and might need replacing? Any advice is greatly appreciated before I start to invest more money into this phone. — Mark Cardelucci

Solution: Hi Mark. Like a software environment, your phone’s hardware is a complicated system with a lot of potential points of failure. Most of these possible points of failure can’t be determined by a simple ocular inspection. Lack of obvious signs of damage like battery swelling, broken circuitry, or disconnected components does not necessarily mean everything is fine. More advanced hardware troubleshooting must be performed to determine where the problem lies. For example, checking the power management IC should be the next logical troubleshooting once you’ve performed some basic checks on the battery. If the phone still fails to boot up normally after ensuring that the battery and power IC work fine, most technicians will recommend a motherboard replacement. If you don’t know how to check the battery and power IC, you should let a trained personnel do it for you.

One of the drawbacks of an untrained user attempting to fix bad hardware is the need to do a thorough diagnostics. In your case, it’s not just a matter of replacing the battery and putting everything back together. Your situation calls for more steps to perform that only an experienced technician with the right tools may be able to do. However, if you think you can manage to do the power IC check and/or replacement, there’s a handful of videos that can give you an idea on what to do.

Power IC is, of course, just one of the ICs in the motherboard. It’s possible that one or more of them are damaged, causing the current problem. A seasoned technician may check each of the ICs around the power IC first, depending on what he thinks the problem is. It can also be that the battery have simply drained itself completely and it does not have enough power left to receive a charge. Basically, what we’re saying is that if you are not trained how to do this type of repair, let someone who does it for a living do it for you.

As far as hardware troubleshooting is concerned, our blog does not provide any at this time. If you intend on fixing this problem all by yourself, consider looking for other guides.

Problem 2: Galaxy S6 powers on but screen remains black

Phone was charging fine. I watched a YouTube live video. When it was over the indicator told me my battery was low. I plugged it in. I left it for maybe 15 minutes and I wanted to check my email for a minute and the screen wouldn’t come on. The blue indicator light was telling me I had a notification but I couldn’t get the screen on. I tried to hold the power button down and of course I cannot see the screen indicating that it was restarting. I even tried to remember where the three buttons are and touch the screen where the restart button is and it didn’t work. So the phone is blinking a blue light with no screen available. — Elliot Young

Solution: Hi Elliot. Since the phone is apparently powered on, as indicated by the blue LED light, it’s either:

  • stuck in an unresponsive state, or
  • its screen is malfunctioning

Do a soft reset

To see if you can restart the phone normally, you must do a soft reset, also known as the “battery pull” simulation. Here’s how:

  1. Press and hold the Power and Volume Down buttons until the Maintenance Boot Mode screen appears (about 12 seconds).
  2. From the Maintenance Boot Mode screen, select Power down You can use the volume buttons to cycle through the available options and the Home button (located below the display) to select.

Troubleshoot the screen

If the phone still fails to boot up, or the screen stays black, you must troubleshoot the display.

These are the quick tips that you can do to try and troubleshoot a possible screen issue:

  • Make sure that your screen isn’t cracked, chipped, or damaged.
  • If you have a case or screen protector, take it off.
  • If you’re wearing gloves, take them off.
  • If you’ve put any stickers over the screen or sensors, peel them off.
  • Make sure that your screen is clean.

At times, third party apps can cause display problems. To check if that’s the case, you should attempt to restart the phone to safe mode. To do that, follow these steps:

  1. Turn the device off.
  2. Press and hold the Power key past the model name screen.
  3. When “SAMSUNG” appears on the screen, release the Power key.
  4. Immediately after releasing the Power key, press and hold the Volume down key.
  5. Continue to hold the Volume down key until the device finishes restarting.
  6. Safe mode will display in the bottom left corner of the screen.
  7. Release the Volume down key when you see Safe Mode.

If the phone restarts to safe mode successfully and the screen works, that’s a confirmation that an app is to blame. To identify the culprit, you must uninstall apps until the issue has been eliminated. Be sure to check for the issue after every uninstall.

We don’t have the full history of the device so if this phone was accidentally dropped or exposed to water or heat, it’s possible that the screen may had been damaged but only recently failed to work completely. To ensure that there’s no software issue behind the trouble, be sure to perform a factory reset on the device. Here’s how:

  1. Turn off your Samsung Galaxy S6 Edge.
  2. Press and hold the Volume Up, Home and Power keys together.
  3. When the device powers on and displays ‘Power on logo’, release all keys and the Android icon will appear on the screen.
  4. Wait until the Android Recovery Screen appears after about 30 seconds.
  5. Using the Volume Down key, highlight the option, ‘wipe data/factory reset’ and press the Power key to select it.
  6. Press the Vol Down button again until the option Yes — delete all user data is highlighted and then press the Power key to select it.
  7. After the reset is complete, highlight ‘Reboot system now’ and hit the Power key to restart the phone.

Send the phone in

If all these troubleshooting won’t restore the normal function of the screen, contact Samsung so the phone can be fixed.

Problem 3: Wet Galaxy S6 won’t charge nor turn on

Hi there. So my phone was in my bag when a bottle of fizzy wet my bag and my phone. At the time my phone was at 2% of power. It was fine when I was checking it but as soon as I got home. I tried to check it again and it just stopped turning on all together. The charging sign on the screen turned on for about 1 second and after that the phone just stopped working. The notification light on the top left corner looks like it’s glitching. The colors that appeared were green and blue. I thought maybe it was just flat but I left it on charge and there has been no good outcome. Please help me. I honestly do not know what to do. — Dalla Kimura

Solution: Hi Dalla. Unlike the Galaxy S7 and S8, an S6 does not have water-resistance protection so even a tiny amount of water, liquid, or moisture that find itself inside can potentially cause problems. At this time, all you can do is to see if you can charge the phone and reboot it normally or in other modes. Otherwise, you’ll need to let a professional take a look at the device.

Below are the steps that you can try:

Boot in Recovery mode:

  1. Charge the phone for at least 30 minutes.
  2. Press and then hold the Home and Volume UP keys, then press and hold the Power key.
  3. When the Samsung Galaxy logo shows on the screen, release the Power key but continue holding the Home and Volume Up keys.
  4. When the Android logo shows, you may release both keys and leave the phone be for about 30 to 60 seconds.
  5. You can either wipe the cache partition or do a factory reset when in this mode.

Boot in Download Mode:

  1. Charge the phone for at least 30 minutes.
  2. Press and then hold the Home and Volume DOWN keys, then press and hold the Power key.
  3. When the Samsung Galaxy logo shows on the screen, release the Power key but continue holding the Home and Volume DOWN keys.
  4. Wait until the Download screen appears.
  5. If you can boot the phone in download mode but not in other modes, that means that your only way out may be to flash a stock or custom firmware.
  6. Use Google to look for a guide on how to do it.

 


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